/*
 * Created on Feb 5, 2008
 * Created by Olivier Chalouhi
 * 
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License only.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */

package com.aelitis.azureus.core.util.png;

import java.nio.ByteBuffer;

public class IHDRChunk extends CRCedChunk {

    private static final byte[] type = { (byte) 73, (byte) 72, (byte) 68, (byte) 82 };

    private int width;
    private int height;

    public IHDRChunk(int width, int height) {
        super(type);
        this.width = width;
        this.height = height;
    }

    public byte[] getContentPayload() {
        ByteBuffer buffer = ByteBuffer.allocate(13);

        // width : 4 bytes
        buffer.putInt(width);

        // height : 4 bytes
        buffer.putInt(height);

        // color depth : 1 byte
        buffer.put((byte) 8);

        // color type : 1 byte
        buffer.put((byte) 0);

        // compression method : 1 byte
        buffer.put((byte) 0);

        // filter method : 1 byte
        buffer.put((byte) 0);

        // interlace method : 1 byte
        buffer.put((byte) 0);

        return buffer.array();

    }

}
